Function getLanguageFromString

getLanguageFromString(str): undefined | string
Finds the language code based on a given string representation of a language.
Parameters
- str: string
  The string representation of the language, this is case sensitive!
Returns undefined | string
The language code if found, otherwise undefined.
Example
```
expect(getLanguageFromString("Deutsch")).toBe("de");
```
Example
```
expect(getLanguageFromString("English")).toBe("en");
```
Example
```
expect(getLanguageFromString("日本語")).toBe("ja");
```
Example
```
expect(getLanguageFromString("no lang")).toBe(undefined);
```
- Defined in index.ts:25

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